Locomotive exhaust-nozzle



J. A. ORMISTON. LOCOMOTIVE EXHAUST NOZZLE.

APPLICATION FILED JULY 20, I918.

Patented J an. 27, 1920.

UNITED STATES PATENT OFFICE.

JOHN ANDREW ORMISTON, OF CALGARY, ALBERTA, CANADA, ASSIGNOR OF ONE-THIRD TO ARTHUR GREEN SLAGHT AND ON E-THIRD TO WILLIAM PATRICK ST. CHAItLES,

BOTH 0F TORONTO, CANADA.

LOOOMOTIV E EXHAUST-NOZZLE.

Specification of Letters Patent.

Patented J an. 27, 1920.

To all whom it may concern:

Be it known that I, J OHN ANDREW ORMIs- TON, of the city of Calgary, in the Province of Alberta, Canada, have invented certain new and useful Improvements in Locomotive Exhaust-Nozzles, of which the following is the specification.

My invention relates to improvements in locomotive exhaust nozzles and the object of the invention is to devise means for increasing the draw of the locomotive stack upon the fire by distributing the exhaust steam issuing from the exhaust nozzle situated beneath the locomotive stack evenly so as to occupy the whole area of the stack and pass upward in frictional contact with the entire internal face of the stack and it consists essentially of the following arrangement and construction of parts as hereinafter more particularly explained.

Figure 1, is a sectional view through the smoke box of a locomotive showing the exhaust nozzle and my tip located beneath the stack.

Fig. 2, is an enlarged plan view of my exhaust nozzle tip.

Fig. 3, is a vertical section through Fig. 2.

Fig. 4, is a sectional detail showing the connection between the petticoat supporting means and the stack.

In the drawings like characters of reference indicate corresponding parts in the various figures.

1 indicates the body of a locomotive and 1 the stack thereof. 2 indicates the usual exhaust pipe provided at its upper end with an out-turned flange 2 3 indicates my exhaust nozzle tip which is provided at its lower end with an out-turned flange 3* adapted to fit against and be bolted to the flange 2* by bolts 3. From the flange 3* my tip flares outwardly at 3 the upper end being provided with an inwardly extending internal annular flange 3 provided with two rows of orifices 3 and 3 extending annularly around the tip. From the inner edge of the annular flange 3 and within the annular orifices 3 and 3 the conical member 3 depends into the center of the tip 3 so that the point thereof is located directly over the center of the nozzle pipe 2.

It will thus be seen that as the steam passes up through the nozzle pipe 2 into the nozzle tip it is distributed evenly therearound by the conical member 3 and allowed to spread by means of the flaring wall 3 of the tip and as it passes out of the tip the steam is broken up by the orifices 3 and 3 so as to insure of its even distribution around the wall of the stack l as it passes upwardly thereinto.

I preferably provide my nozzle tip with a surrounding annular duct 4 cast integral therewith and provided with an annular series of perforations 4".

5 indicates a pipe by which steam may be supplied to the duct 4. This annular duct is utilized when starting up the fire of the locomotive, steam being supplied to the pipe 5 from a suitable source, which steam passes into the annular duct 4 and through the perforations upwardly into the stack to cause an initial draft.

7 indicates a petticoat which is supported over the nozzle tip 3 by depending bolts 7 provided with an out-turned upper end and which extend through slots 7 in the stack of the locomotive and which are adjustably secured by nuts located on the outside of the stack, the washer 7 serving as a covering means for the slot 7. By this means the petticoat may be raised or lowered to the desired position in relation to the nozzle tip.

In order to produce a maximum draft it is essential that the exhaust steam be spread evenly so as to pass upwardly in frictional contact with the internal face of the wall of the stack thereby producing the necessary draft.

From this description it will be seen that I have devised a very simple device whereby such exhaust steam may be spread and evenly distributed so as to bring about this result, that is, a maximum draft.

IVhat I claim as my invention is.

In a locomotive, the combination with the exhaust pipe of a locomotive, of a nozzle tip secured to the upper end of the exhaust pipe and flaring outwardly, an inwardly extending annular flange at the upper end of the tip having a plurality of rows of orifices aranged therearound, the orifices of one row being staggered in relation to the orifices of the other row, and a conical member carried by the annular flange and depending downwardly into the tip.

JOHN ANDREW ORMISTON. Witnesses:

M. EGAN, N. CARTER.- 

